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Beckett #5880 low fire rate baffle purpose?

By restricting the air flow out of the blower, the low fire baffle allows the air band slots to be open more which making them less affected by the restriction over the season from lint buildup. Also the wider openings are less touchy to adjust.

The air cone should always be used on the AFG, it is not an option.

The AF uses a different blower wheel and should not use the cone. The AF uses a flatter air guide.


  • Steve_154
    Steve_154 Member Posts: 16
    Beckett #5880 low fire rate baffle purpose?

    Hello all
    Can someone please explain to me the purpose & operation of 2 Beckett AFG components? Are both optional?
    Part # 5880 low fire rate baffle....where does it mount, under what conditions do you install one?

    Same for Beckett AFG "Air Guide" # 31231U.
    This is a cone shaped piece. Is this optional also?
    under what conditions is this used?

  • Bob_102
    Bob_102 Member Posts: 16

    The AFG air guide is an efficient way to feed air to the fan blades in order to build up static air pressure in the AFG burner, the velocity of the incoming air causes the air to ride around the guide and efficiently be fed onto the blades. Without it most of the air will just tumble around inside the fan.

    As you operate at lower firing rates you close the air bands upstream of the guide, lowering the velocity, causing it to be less efficient. The low fire baffle restricts the air coming off the fan therefore causing you to open the air shutter thus raising the velocity of the incoming air and increasing the efficiency of the air guide and fan at lower firing rates.

    The baffle should be used according to the Beckett OEM spec guide, or according to the instructions included with the baffle or inside of the AFG instruction sheets.

    The baffle is inserted inside of the burner on the edge of the wiring area. It is tapped into place with a hammer.
  • Steve_154
    Steve_154 Member Posts: 16

    Thanks for the excellent theory of operation on those items.
    You left nothing to the imagination, much appreciated!
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